30999222 has 24 divisors (see below), whose sum is σ = 70700760. Its totient is φ = 9789120.

The previous prime is 30999217. The next prime is 30999247. The reversal of 30999222 is 22299903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44979 + ... + 45662.

It is an arithmetic number, because the mean of its divisors is an integer number (2945865).

Almost surely, 2^30999222 is an apocalyptic number.

30999222 is an abundant number, since it is smaller than the sum of its proper divisors (39701538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30999222 is a wasteful number, since it uses less digits than its factorization.

30999222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90668 (or 90665 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 30999222 is about 5567.6944959292. The cubic root of 30999222 is about 314.1354372665.

It can be divided in two parts, 3099 and 9222, that added together give a palindrome (12321).

The spelling of 30999222 in words is "thirty million, nine hundred ninety-nine thousand, two hundred twenty-two".